Banks Power 51327 Revolver Exhaust Manifold System for 91-99 Jeep 4.0L 6-Cyl

Vehicle Fitment

• 1991-1999 Jeep Wrangler YJ/TJ (4.0L I6 Gas Engine)
• 1991-1998 Jeep Cherokee XJ (4.0L I6 Gas Engine)
• 1991-1992 Jeep Comanche MJ (4.0L I6 Gas Engine)

Features

• Revolver Exhaust Manifold System engineered to improve exhaust flow
• Mandrel-bent 409 stainless steel tubes for durability and smooth flow
• Patented Revolver collector with Power Pickle technology for torque gain
• Precision-milled ½" thick flanges for long-lasting seal and strength
• Precision port-matched tubes for efficient exhaust scavenging
• Bolts directly to stock exhaust system for simple installation
• Reduces backpressure for improved low-end and midrange torque
• Improves throttle response on 4.0L inline-6 engines
• Designed for rugged off-road and everyday driving conditions

Specifications

• Brand: Banks Power
• Part Number: 51327
• Type: Revolver Exhaust Manifold / Header System
• Material: 409 stainless steel
• Header Style: Shorty design with high-velocity collector
• Primary Tube Diameter: ~1.5"
• Fitment Years: 1991-1999
• Engine Compatibility: 4.0L I6 gas engine
• Installation: Direct bolt-on replacement for stock manifolds

Included Components

• 1x Revolver Exhaust Manifold / Header assembly (pair)
• 1x Set of gaskets
• 1x Mounting hardware kit
• 1x Installation instructions

Product Description

The Banks Power 51327 Revolver Exhaust Manifold System is a premium performance header upgrade for 1991-1999 Jeep Wrangler YJ and TJ models, 1991-1998 Cherokee XJ, and 1991-1992 Comanche MJ trucks equipped with the 4.0L inline-6 engine. This exhaust manifold system replaces the restrictive factory exhaust manifolds with mandrel-bent 409 stainless steel tubing and a patented Revolver collector designed to better scavenge exhaust pulses out of the engine. The result is improved exhaust flow, reduced backpressure, and stronger torque delivery across the rpm range.

Built with precision port-matched tubes and rugged flanges that resist warping, the 51327 is engineered for durability under both daily driving and off-road conditions. The direct bolt-on installation uses factory exhaust connections and includes all necessary gaskets and hardware. With enhanced throttle response and torque gains, this manifold system is ideal for Jeep enthusiasts looking to extract more performance from their 4.0L engine. Fitment is confirmed through 1999; due to the age of this part, 2025 compatibility is unconfirmed at time of listing.